Bicycle attachment.



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` G. W.- PULLIAM.

BICYCLE ATTACHMENT., APPLICATION FILED JULY 26,1905, magma-SHEET 1v.

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` .y .TATENTED MAR. 27,1906. G. W. PULLTAM. y BIGYGLB ATTACHMENT:

APPLICATION FILED JULY'zs, 15305.l .n

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[UNITED sTATIis`l- PATENT OFFICE. f

BICYCLE ATTAOHMENT.

Speccation of Letters Patent.

Appnmion fuea my 26, 1905. serial No. 271.355.

'To @ZZ whom it may ctn/Learn:

Be it vknown that I, GEORGE w. PLLIAM,

l a citizen of the United States, residing at Columbia, in the county. of Boone and State of Missouri, have invented new and useful Improvements in Bicycle Attachments,of

. which the following is a specification.

My invention isv an attachment for bicycles to adapt the same for travel on railwayv tracks. l

The object of the invention is to remedy certain defects'in attachments of this kind now in use; and to this end it consists in certain novel features of construction hereinafter described and claimed.

.In the accompanying drawings, Figure 1 is a plan view showing the attachment in use.

Figs. 2 and 3 are transverse sectional views.

on theJ linesv 2 2 and 3 3, respectively, of Fig. 1. Fig. 4 is a detail showing the end of one of the transverse bracesl hereinafter de-v scribed. Fi 5'is a sectional view showing the manner 1n which the flanges with which the bicycle wheels` are fitted are secured. Fig. 6 is a plan view of a modification.

Referring specifically to the drawings, 9 denotes an ordinary bicycle. Its wheels are iitted on each side with flanges 10 and 11, re-

j spectively, the former of which projects beyond the tire-to extend along the inner side of the rail, as clearly shown in Fig. 5. The outside flange 11 does not project beyond the tire. These iianges give kthe bicycle a firm and steady bearing on the rail without aHecting the resiliency o f thetires. The flanges .are made Of sheet metal and are fastened to the wheels by bolts 12, provided with wingnuts 13.

and upon tightening the nuts'13 the iianges are securely fastened.- j j VThe auxiliary wheel is indicated at 14 and is flanged, as at l15,' similar to an ordinary shown, they being connected to the rear fork 1.7, front fork 18, andthe handle-bar post 19, respectively. The braces comprise two telescoping sections 20 and 21, respectively, which are held in adjustedposition by setscrews 22. The ends of the sectionsV 20 which are fastened to the bicycle-frame These bolts extend through the.l flanges just behind the felly of the wheels, j

have hooks 23 extending around the parts of the frame heretofore mentioned. The hooks are clamped to the frame by set-screws 24, which are threaded through lateral extensions 25 yat the ends of the sections 20 opposite the hooks. The sections 21 are fastened by set screws in short socket pieces 26,

formed integral with and projecting from the block 16. y

A bevel-gear 27 is fast on the axle of the wheel 14 and meshes with a bevel-gear 28 on a shaft 29, journaled in a bearing-block 30, which is formed integral with the block 16, said parts being connected by a web 31. The shaft 29 carries at its opposite end a bevelgear 32, which meshes with a bevel-gear-33, bolted to or formed integralwith the rear sprocket 34 of the bicycle. A block 35 is bolted on the rear fork 36 of the bicycle and has a bearing for the shaft 29. The block is in two pieces, as shown, which are clamped to the fork 36 by bolts 36a. The transverse brac-e connected to the fork 17 carries a block 37, having a bearing-hole through which the shaft 29 extends. The block is fastened to the brace by a set-screw 38 and within the block the shaft may be split and coupled in any suitable manner.

The parts herein described can be readily applied to any ordinary bicycle without altering its construction. The gearing between the drive-wheel of the bicycle and the auxil- Patented March 27, 1906.

latter inproper position on the rail, thus reducing the friction of its flange with rail, and

thereby saving power and giving a greater rate of speed with the same power, as well as lessening the liability of derailment. Withouf the gearing the flange of the auxiliary wheel has a tendency when riding fast to bind against the edge of the rail and to dra behind, which brings the front wheel o the bicycle over inside the rail, which frequently causes upsetting of the rider. These objectional features are entirely eliminated by the gearing and rapid as well as safe riding is attained4 by its use.

In Fig. 6 is shown a plan view of a modification wherein two auxiliary wheels 39'and 40, respectively, are used. The rear wheel 40 is geared to the drive-wheel of the bicycle, as before. However, the bevel-gearing is dispensed with and a spur-gearing is used, the position of the wheel 40 with respect to the bicycle driving-wheel permitting the use of this form 'of gearing. y The second auxil- IOO IIO

iary Wheel is employed to give the attachment sulicient stability. In the first form the auxiliary Wheel is abreast of the rider, Which gives the attachment the necessary stability, but necessitates the use of bevelgearing.

Having thus described my invention, What is claimed as new, and desired to be secured by Letters Patent, is`

1. The combination With a bicycle, of an auxiliary Wheel extending from one side thereof, and geared to the drive-Wheel of the bicycle.

2. The combination With a bicycle, of brace-rods extending laterally from the frame thereof, a bearing carried at the outer GEO. XV. PULLIAM. Witnesses W. D. SITToN, G. R. TAYLOR. 

